Warp stop-motion for looms.



APPLICATION FILED NOV. 6, 189'l.-

no MODEL.

2 SHEETS-SHEET 1,

F.. s o j /W. m .n e J. r Ill n W A ./I\ 1MB W A u 0 g 490 o 0 M 'PATENTED 001-13, 1903.!"

J. F. DUSTIN. v WARP STOP MOTION FOR LOOMS.

' APPLIUATION FILED NOV. 6, 1897.

' 2 SHEETS-BEEET 2.

N0 MODEL.

Inventor.

"Witnesses.

UNIT D STATES Patented October 13, 1903.

PATENT OFFICE.

JOHN FRANKLIN DUSTIN, OF FITCHBURG, MASSACHUSETTS, ASSIGNOR TO HIMSELF AND THE PARKHILL MANUFACTURING COMPANY, OF FITCH- BURG, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

-WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Iietters l atentNo. 741,577, dated October 13, 1903. Application filed November 6, 1897. Serial No. 657,612. (No model.)

To all whom it may concern:

Be it known that I, JOHN FRANKLIN Dos strong, simple, and inexpensive warp stopmotion for looms which can be readily and I cheaply applied to looms employing several harness-frames.

A further object of my invention is to construct and combine the stopping devices with the heddle-frames, so that the same may be controlled either fromaspecial form of sheetmetal heddle or from substantially the ordinary'form of wire heddle.

To these ends my invention consists of the parts and combinations of parts, as herein-.

a 5 after described, and more particularly pointed out in the claim at the end of this specification. f v

In the accompanying two sheets of draw-' ings, Figure l is a sectional view of suflicient parts of a loom to illustrate the application of myinventionthereto'. Fig. 2 is a perspective view of one of the heddle-rods which I preferably employ. Fig. 3 is a perspective view of one of the feelers which is mounted inside of a heddle-rod. Fig.4isadetail view illustrating a form of heddle which I may employ. Fig. 5 is a detail view illustrating a slightly-modified form of heddle. Fig. 6 is a perspective view showing the application of 0 the stopping devices to three heddle-frames.

Fig. 7 is a front view of a heddle-frame constructed according to my invention, and Fig.

8 is a similar view showing the parts in a'different relative position.

vWarp stopping devices for looms have heretofore ordinarily been controlled either from movable pieces or feelers mounted on the. warp-thread or fromthe motion of heddles movably mounted in the heddle-frames.

The warp stop-motions which employmovable pieces or feelers through which the warpthreads are drawn are objectionable, as their use necessitates an additional drawing in'of the warp-threads.

The object of this invention is to improve that class of warp stop-motions which are controlled by the devices carried onthe heddleframes.

One especial object of my present invention is to arrange the stopping devices so that they will not add to the weight or thickness of the harness-frames and will not interfere with the free vertical movement of the harnessframes even when applied to that class of looms where several of such harness-frames are employed.

A warp stop-motionfor looms constructed according to my invention comprises a plurality of harness-frames having transverse heddle-rods and heddles which are movably mounted on said heddle-rods, so as to cooperate with feelers which are located inside of the" heddle-rod s.

Referring to the drawings and in detail, A designates one of the loom sides, mounted in which are the Warp-roll B, whip-roll C, and breast-beam E. A vibrating lay F is provided with a reed for beating up the weft in the ordinary manner. l

The motion of the loom'is controlled by a starting-lever G, which while the loom is in motion is held in a notch in a bracket in the ordinary manner, which need not be herein shown or describedr The parts as thus far referred to may be of 85 any of the ordinary or preferred constructions.

The harness-frames D are mounted'in the loornto be reciprocated vertically in the ordinary manner. I

In Fig. 1 I have illustrated a loom provide with two heddle-frames; but it isto be un-' derstood that my invention is equally applicable to a loom employing a greater number of heddle-frames.

As illustrated in Fig. 6, three heddle-frames are shown, which are provided with the ordinary round-bottom heddle-rods 10 and with upper heddle-rods 11 of special construction.

As shown most clearlyin Figs. 2 and 3, the heddle-rods 11 are formed from sheet metal bent to substantially a U shape and are provided on their upper edges with upwardlyextending teeth or projections 12. Fitting inside of the heddle-rods 11 and held in place by means of pin-and-slot connections are feelers 13, having upwardly-extending teeth or projections 14, corresponding with the teeth 12. Secured at one end of the heddle-frames D and connected to normally move the feelers 13 to the right, as illustrated in Fig. 6, are light torsional springs 18. The heddles, which are mounted on the heddle-rods 10 and 11, may be stamped from sheet metal or may be of substantially the ordinary wire construction.

As illustrated in Fig. 4, the sheetmetal heddle 15 is provided with a central threadreceiving eye 17, with an upper eye 16 for engaging the heddle-rod 11 and with a narrow lower eye 18 for engaging the heddle-rod 10. By means of this construction it will be seen that the heddles are movably mounted on the heddle-rodsthat is to. say, when a heddleframe is drawn down the tension of the warpthreads will raise the heddles to their highest position in the heddle-frame, as illustrated in Fig. 6. If a warp-thread should break or should become unduly slackened for any reason, the heddle corresponding therewith will be left free during the downward movement of the heddle-frame and will drop down into engagement with the teeth on the upper edges of the heddle-rod 11 and its feeler 13, so as to lock the feeler 13 against transverse movement. Godperatingpwith the feelers 13 and secured in place in any desired manner inside of the loom side A is a spring camplate 19. Pivotally supported below the spring cam-plate 19 is a pivoted frame 20, which is connected by a rod or wire 21 to a lever 22. The lever 22 is pivotally connected at the front of the loom to a knock-out piece 31 and may be guided at its rear end by an open-topped bracket 30. Extending up from the piece 22 is a lug or projection 33, which is arranged to cooperate with a downwardlyextending projection 34, carried by the vibrating lay F.

During the normal operation of a loom provided with a warp stop-motion constructed according to my invention the feelers 13 will be normally forced to the right, as illustrated in Fig. 6. When a heddle-frame is drawn downward, its feeler 13 will normally be brought into engagement with the spring cam-plate 19 and will be forced back thereby against the tension of its spring 18. lVhenever a warpthread breaks or its tension becomes unduly slackened, the heddle corresponding therewith will drop down, as illustrated in Fig.8,so that the feeler 13 corresponding therewith will be locked in its extended position. When a heddle-frame D descends with the parts in this position, the spring cam-plate 19 will be forced back, as illustrated in Fig. 8, and the feeler 13 will engage the pivoted frame 20, so as to raise the piece 22, bringing the lug or projection 33 into the path of the lug 34:, carried by the vibrating lay, so that the piece 22 will be shifted by the lay to throw the controllinglever G out of engagement with its notch to automatically stop the loom.

One especial advantage in a warp stop-motion constructed according to my invention resides in the fact that I may employ heddles constructed of wire in the ordinary manner for controlling the same.

As illustrated in Fig. 5, I may use an ordinary form of wire heddle 35, having a central thread-receiving eye 36 and end eyes 37 and 38, this heddle 35 being of the same construction as the heddles now employed, except that its end eyes 37 and 38 are made somewhat longer, so as to allow for the movement of the heddle with respect to its heddlerods.

A further advantage in a warp stop-motion constructed according to my invention resides in the fact that the same can be readily and cheaply applied to looms already in operation.

The stopping connections are of simple and inexpensive construction, occupying little room, and can be easily secured in place.

To apply my warp stop-motion to an old loom, it is simply necessary to secure the stopping connections in place and to replace the heddle-frames with heddle-frames provided with my form of heddle-rods and feelers.

In some cases I may even employ the old heddle-frames, simply replacing the upper heddle-rod of a heddle-frame with my sheetmetal toothed heddle-rod 11.

I am aware that many changes may be made in the construction of warp stop-m0- tions by those Who are skilled in the art and that the stopping connections for throwing off the lever from the action of the feelers 13 may be widely varied without departing from the scope of my invention as expressed in the claim. I do not wish, therefore, to be limited to the form which I have shown and described, but

What I do claim, and desire to secure by Letters Patent of the United States, is-

In a loom,the combination of heddle-frames, grooved transverse heddle-rods having teeth or projections along one edge, toothed feelers mounted in said heddle-rods, springs for normally extending said feelers, heddles movably mounted on the heddle-rods, a spring connected to the throw-01f device, substan IO cam-plate for normally forcing 'back said tially as described.

feelers arranged to yield when a feeler is locked in position by a heddle, and stopping connections comprising a pivoted frame arranged to be engaged by the feelers, a connecting-link extending down from the piv0ted frame, and a movable piece having a projection for engaging the vibrating lay and In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN FRANKLIN DUSTIN.

Witnesses: I

LOUIS W. SOUTHGATE, PHILIP W. SOUTHGATE. 

